Z test statistic formula calculator

    • [DOC File]Hypothesis Testing and Confidence Intervals

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      INFERENCE PROCEDURE CONDITIONS TEST STATISTIC CONFIDENCE INTERVAL CALCULATOR Two Mean ’s are UNKNOWN. 2 Sample t-test. 2 Sample t-interval SRS for both? Normal for both? (Is n large enough? If not GRAPH BOTH!) Independent? If random, OK. df = smallest of and . or ugly formula df = smallest of and . or ugly formula Stats/Test/ 2samplettest or ...

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    • [DOC File]TI-85/86 Equation Solver

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      ONEPROP=Z=(PHAT-P)/(P(1-P)/N) Z is the test statistic you are calculating. PHAT is , the actual percentage of your sample with a characteristic. P is the expected percentage with the characteristic or the overall percent of the population with that characteristic. N is the total number of items in the sample. 2-Proportion Z-Test: TWOPROP=Z=(PHAT1-PHAT2)/(PP(1-PP)/N1+PP(1-PP)/N2)

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    • [DOC File]1 - Weebly

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      Test statistic. formula and substitution—identify the appropriate test and substitute values. Check the assumptions or conditions. needed to be able to use this test statistic—each test has certain conditions under which it applies. III. Correct mechanics, including the value of the test statistic, df and P-value—this includes: Compute

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    • [DOC File]Z-Score Practice Worksheet

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      Find the z-scores corresponding to each of the following values: A score that is 20 points above the mean. z=2. A score that is 10 points below the mean. z=-1. A score that is 15 points above the mean z=1.5. A score that is 30 points below the mean. z=-3. The Welcher Adult Intelligence Test Scale is composed of a number of subtests.

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    • [DOC File]The Practice of Statistics

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      Give the formula for the two-proportion z-statistic, and define each variable in the equation. Is this on the formula sheet? What does the test statistic measure? State and use diagrams to illustrate the three possible alternative hypotheses for a two proportion z-test.

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    • [DOC File]Thursday, February 3:

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      What is the test statistic for a two-sample z test for a difference in proportions? Is this on the formula sheet? What does the test statistic measure? Alternate Example: Hearing loss. Are teenagers going deaf? In a study of 3000 randomly selected teenagers in 1988–1994, 15% showed some hearing loss.

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